/**
 * Copyright 2020 jianggujin (www.jianggujin.com).
 * 
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *  
 *      http://www.apache.org/licenses/LICENSE-2.0
 *  
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package com.jianggujin.dbfly.util.dtd;

import java.io.IOException;
import java.io.PrintWriter;

import com.jianggujin.dbfly.util.JAssert;

public abstract class JDTDItem implements JDTDOutput {
    private final JDTDCardinal cardinal;

    public JDTDItem() {
        this.cardinal = JDTDCardinal.NONE;
    }

    public JDTDItem(JDTDCardinal cardinal) {
        JAssert.notNull(cardinal, "cardinal不能为空");
        this.cardinal = cardinal;
    }

    public JDTDCardinal getCardinal() {
        return this.cardinal;
    }

    @Override
    public void write(PrintWriter out) throws IOException {
        this.writeInternal(out);
        this.cardinal.write(out);
    }

    protected abstract void writeInternal(PrintWriter out) throws IOException;
}
